Mrsa

Expressions researched:
"Mrsa"

SB Canto 4

SB 4.8.2, Translation and Purport:

Another son of Lord Brahmā was Irreligion, whose wife's name was Falsity. From their combination were born two demons named Dambha, or Bluffing, and Māyā, or Cheating. These two demons were taken by a demon named Nirṛti, who had no children.

It is understood herein that Adharma, Irreligion, was also a son of Brahmā, and he married his sister Mṛṣā. This is the beginning of sex life between brother and sister. This unnatural combination of sex life can be possible in human society only where there is Adharma, or Irreligion.